Pip install from pypi works, but from testpypi fails (cannot find requirements)

I’m trying to create my first python package. To not bungle the whole deal, I’ve been attempting to upload it to the testpypi servers. That seems to go fine (sdist creates and upload doesn’t show any errors). However, when I try to install it to a new virtualenv from https://testpypi.python.org/pypi, it complains about my install requirements, e.g.: